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Dear Student, Read question and answers
 |
| Deepa Rani V Mani |
| VCSHSS, |
| Puthenvelikara |
Q1. Identify the vector quantity.
Answer: Force
Q2. Two vectors 3 units and 5 units are acting at 60 degree
to each other . what is the magnitude of the resultant?
Answer: 7units.
Hint:
Q3. The path of a projectile is .......
Answer: Parabolic
Q4. Velocity of a projectile is 10m/s. At what angle to the horizontal
should it be projected so that it covers maximum horizontal range.
Answer: 45 degree
Q5. Which of the following is NOT an example for projectile motion?
Answer: A.Rocket in flight which is straight line
Q6. Name the physical quantity that does not change in projectile motion.
Answer: Horizontal Component of velocity.
Hint:
Horizontal Component of velocity u is u Cos(θ)
Q7. The magnitude of the vector 3i+4j is .....
Answer: 5
Hint:
Q8. Angular velocity of second hand of a clock is...
Answer: 2 π /60
Hint: ω= 2 π / T
Q9. During uniform circular motion , name the quantity that changes
Answer: Velocity
Q10. If vector A is perpendicular to vector B,what is the value of A . B ?
Answer: AB Cos(90)
Hint: A . B = AB Cos(θ)
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